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Eaton / Cutler-Hammer HMDL3350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Panel Mount
Eaton / Cutler-Hammer
HMDL3350
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
HMDL3350
Quantity
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Eaton / Cutler-Hammer HMDL3350 - 350A 3 Pole Molded Case Circuit Breaker
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Description
Built for industrial applications, the Eaton HMDL3350 is a 350A, 3-pole molded case circuit breaker from the Series C family. It utilizes a rugged M-Frame design for demanding distribution tasks. It installs into compatible Eaton panelboards, switchboards, and motor control centers. The unit features standard lug terminals and supports reverse feed configurations. Rated at 65 kAIC at 480V, it provides dependable LI protection. The "H" prefix indicates high interrupting capacity.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | HMDL |
| Amperage | 350A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 25kA @ 250VDC |
| Frame Type | MDL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | Two 1 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 1 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Terminals |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | High Interrupting Capacity, HACR Rated, Reverse Feed |
Product FAQs
8 answersWhat enclosures and equipment are compatible with the HMDL3350?
This breaker is designed for use in Eaton Series C panelboards, switchboards, and motor control centers that accept M-Frame circuit breakers.
What frame size is the HMDL3350?
It is an M-Frame circuit breaker, specifically utilizing the MDL frame footprint.
What does the H in the HMDL3350 catalog number indicate?
The H designates it as a high-interrupting capacity breaker. It provides a 65 kAIC rating at 480VAC, compared to the standard MDL frame which has a lower interrupting capacity.
Is the HMDL3350 a 100% rated circuit breaker?
No, this is a standard 80% rated breaker. For a 100% rated equivalent, you would need a breaker with a C prefix, such as the CHMDL series, which also requires an electronic trip unit.
Can the HMDL3350 be reverse fed?
Yes, standard Series C thermal-magnetic M-Frame breakers like the HMDL3350 are suitable for reverse feed applications.
What wire sizes do the standard lugs on this breaker accept?
The standard feed-thru lugs accept two 1 AWG to 500 kcmil aluminum or copper conductors per phase.
Can this replace an older Cutler-Hammer HMDL3350?
Yes. Eaton acquired Cutler-Hammer and continues to manufacture the Series C line. An Eaton HMDL3350 is a direct, exact replacement for a Cutler-Hammer breaker with the same catalog number.
Does the HMDL3350 include ground fault protection?
No. This breaker features standard thermal-magnetic Long-Time and Instantaneous (LI) trip functions. It does not provide equipment ground fault protection, which would require an electronic trip unit with an LSIG configuration.
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